What is butterfly valve

secureluokai March 5, 2025

The structure of the butterfly valve is simple, with a compact size and lightweight design. Its straightforward design and ease of operation make it suitable for manufacturing large-diameter valves, which can effectively regulate flow. As a result, butterfly valves are widely used in industries such as petrochemicals, metallurgical steelmaking, water treatment, and power generation. In recent years, with the continuous advancement of industrial technology, butterfly valves have become one of the fastest-growing types of valves. Their application scope is increasingly broad, and the variety and quantity of designs are continuously expanding. They are evolving towards multifunctional capabilities, including high temperature and pressure resistance, strong sealing performance, and long service life. The double eccentric butterfly valve, also known as the high-performance butterfly valve, is particularly used in systems such as water plants, power plants, steel mills, chemical plants, water source projects, and environmental facilities. It plays a crucial role in drainage systems, especially in water pipelines, serving as a regulating and shut-off device. The structure of butterfly valves has evolved with technological advancements and changing demands, overcoming limitations through practical exploration and continuous improvement.

The butterfly valve has undergone a long period of development from its initial design to its widespread application today. Its advantages lie in its lower cost compared to similar equipment, making it a reliable choice for various critical and demanding control pipelines, whether as an on-off valve or a regulating valve. As long as the selection is appropriate, butterfly valves can be used with confidence. Due to varying market demands, the structure and functionality of butterfly valves have been continuously optimized, leading to their ongoing evolution and development. There are multiple classification methods for butterfly valves. Based on valve structure, they can be categorized as centerline-sealed butterfly valves, single eccentric butterfly valves, double eccentric butterfly valves, and triple eccentric butterfly valves. Based on sealing construction, they can be divided into metal-sealed and soft-sealed types, with the latter lined with rubber or fluoroplastic. Additionally, metal seals can adopt multi-layer sealing structures or elastic sealing structures.

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